Peters



i 3` Shets-Sheet L wgIHERED. .M

Hot Air Furnace.

Patented Jany 1860,

aff/wg u. Pneus. www: n. c.

SAMUEL WETHERED, oF BALTIMORE, iv'IAIYLANn. p `L l Hor-Ara EURNACE.

specification of Letters intent No; 26,724, dateeiauai-f e,`

To all whom 'it may concern.'

Be it known that yI, SAMUELVVETI'IERED,`

of Baltimore, in the county of Baltimore i and State of Maryland, have invented a new and useful Improvement in Brick Hot-Air Furnaces; and I do hereby declare that the following is a full, clear, and exact descrip-` tion of the same, reference being had to the accompanying drawings, forming apart of this specification, in which- Figure l, is a front elevation of a furnace constructed after my invention. Fig. 2, is a vertical transverse section of the same, and Fig. 3, is a broken vertical section in the line y, y, of Fig. 2. Fig. 4 is a vertical longitudinal section.

`Similar letters of reference, in each of the several figures, indicate correspondlng parts...

The object of my invention `is to render practicable the substitution of brick orother argillaceous material in the construction of hot air furnaces, for ironandthus obviate the drying and deadening `effects of the lat.- ter material upon the air warmed by con-` tact with the same or by the heat` radiated therefrom. Air heated by argillaceous substances, it may be well known is supplied to the room in a more moist and healthy state than air heated by metal, as the former does not become so intensely heated as to burn the air and deprive it of moisture nor does the heat radiated therefrom, in mingling with the air, impart to it an unhealthy and disagreeable smell.

My invention consists in the combination of side registers, auxiliary side cleansing and draft apertures and an inclined fire chamber; with a `furnace constructed internally of a series of hollow arches projecting alter` nately up from the bottom and down from the crown wall of the furnace in a manner to form a zig-Zag or serpentine draft passage from the fire box to the escape pipe or chimney fine, and to form air heating chambers extending from the front to the rear of the furnace, said arches being closed in at front and rear bybrick walls and supplied through the auxiliaryregisters with pure external cold air, and also being allowed to communicate with a hot air reservoir on top of the crown wall of the furnace by4 means of vertical branch pipes leading from the arches through the crown wall in such a manner as not to materially obstruct the main draft.

`order to have the flamepassloverithe Qfirs clined back plate a, andlywith a` horizontal `parallel with it Ifconstruct` an; inverte By the` use 'ofmyf inclinedfieibox y necessity .of using }axdeep`:bed"of coali arch is avoided, "for althoughiathinfbed ofyl coal is used, theflame will `escape@ioinljtheta) 1 rear endof the firebox `ijnstatvlthe `tolpfofx1 the first arch. Thecombustioiizdfithejfueli` will also be more certain becauseithetbed: ofvI` l" coal'is thinand;` the draftwill haveaillfreez" passage through thesame; from the frontzgofi` l the fire boxto gitsgrear. ByIthemse;ofimy` side registers, the cold air to be treatedfca i be supplied in any desired quantity]directly` into the arches, and thus the apartmentskept; heated to the ldegree required` byfltlieitem perature of the, atmosphere, and {by} theyuse i of `my auxiliary draft v and cleansing; pas-` 1` sages, the combustion oflthe fuelgin` thejfii box and the circulation oftheflarne throng the circuito'uspassage` is" renderediii `orepe feet, and facilitiesforintroducingi. us between the arches to `removefsoot" are als secured. t f my, f. 1 p

To enable others`,skilled ithe art,` t0., make and use my invention, prdceed` to describe `its constructionfand operati YA A `A2 A3,frepres`entsf: hewwall chf incases the fire box :archesetcm `This `iwall is made of brickandmay itself, ifdesirableg be incased so as to haveyanair orwnonfgcon-LSS ducting space allarou d git" so aslyto" retain the heat usually wasted;` by,` external` radia-g tion, for warming apartments.;` Atonesid or corner I construct-a ireboxwithan in grate b. This re `box is furnished "fwithf an ash pit c, and with `draft andfsiipply door al, as shown. `To form `the innerlsidef of the fire box,1the` outer side being formed, by one of the side wallsiA?, constructgan upright hollow brick` arch` :;B",w; from` th foundation e, of the furnace togwithinf short distance of the crown wall f, and have. the ends of themarch unite withthelfron and rear walls A, A', offthefurnace; jatgal,

short distance fromthis arch and runnin hollow arch Bl fromthe crownlwallldowm to within a short distance lof thefoundation" plate and have the ends of thislarchgzunite" *1 i with the frontand ,endwwallsKA,` Afjof the furnace. And thusljcontinue tofaltera nately construct` upri,`, ;htf1 andfxm inverted arches until I arriveiwithinla" short distance p j, of side wall A3, of the.furnacew` Inwthisfvll l,

arches.

wall I 4form an escape or chimney passage. g, which communicates with the serpentine or Zig-zag flue 71 la, h, leading furom the fire box and formed "by thus constructing the arches, as illustrated by the arrow. Auxiliary draft and soot cleaning doors are also provided in the external wall so as to communicate with the serpentine draft passage and thus facilitate the circulation of the flame through the same, and allow 0f a brush being introduced between the arches so as to remove the soot. Each of the arches thus constructed constitutes in itself an air heating chamber, and by its peculiar arrangement, and the inclined form of the back plate of the fire chamber, its whole outer surface is exposed to a constantheat and the air which may be in it, consequently is warmed by said heat to the proper temperature for being supplied into apartments.

E, E, are doors or cold air flues for sup-V plying pure cold air to the interior of the These doors may be perforated or constructed and arranged to slideV or in any way so as to control and regulate the admission of cold air to the arches from the outside' of the furnace.

F, F, are narrow hollow branch passages leading down through the crown wall into the furnace so as to communicate with the interior of the arches, B, B. These tubes are placed some distance apart as shown in the view Fig. 3, so that the heated flame may circulate between them andnot be obstructed.

F, F are passages leadingV down through the crown wall into the arches B B as shown.

JGr, is a brick hot air reservoir constructedl on top of the crown wall of the furnace; this reservoir receives the hot air from the arches through the tubes and pas sages F, FX, and distributes it through a register H, into Various flues leading to What I claim as my invention and desire to. secure by Letters Patent, is-Y Y The combination of the inclined fire box side cold air Vdoors or registers and auxiliary side draft and cleansing-passages, with a furnace constructed with a series of hollow arches which form a zig-zag flame passage from the fire box to the chimney flue and communicate by branch tubes with a hot air reservoir; all in the manner and for the purpose herein set forth.

SAML. WETHERED. Witnesses:

SAML. D. TOY, JAS. MEYLER. 

